<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>混合布局编程挑战</title>
    <style type="text/css">
        body{ margin:0; padding:0; font-size:30px; color:#fff}
        .top{width:100%;background:#cccccc;height:100px;}
        .main{width:100%;background:red;height:300px;}
        .left{width:200px;background:blue;height:300px;position:absolute;left:0;top:100px;}
        .right{margin:0 0 0 210px;background:#7fcc3c;height:300px;}
        .foot{width:100%;background:#f60;height:100px;}
    </style>

</head>

<body>
<div class="top">top</div>
<div class="main">
    <div class="right">right</div>
    <div class="left">left</div>
</div>
<div class="foot">foot</div>

</body>
</html>